1628809803 has 24 divisors (see below), whose sum is σ = 2445676240. Its totient is φ = 1084614948.

The previous prime is 1628809753. The next prime is 1628809807. The reversal of 1628809803 is 3089088261.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 1628809803 - 2⁹ = 1628809291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628809807) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1886950 + ... + 1887812.

Almost surely, 2^1628809803 is an apocalyptic number.

1628809803 is a deficient number, since it is larger than the sum of its proper divisors (816866437).

1628809803 is an frugal number, since it uses more digits than its factorization.

1628809803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1628809803 is about 40358.5158671624. The cubic root of 1628809803 is about 1176.5854085062.

The spelling of 1628809803 in words is "one billion, six hundred twenty-eight million, eight hundred nine thousand, eight hundred three".